<?php // lint >= 7.4

function foo():   Foo
{

}

$callback = function():   Foo
{

};

$callback = fn ($a):   Foo => $a;

interface Foo
{

	public function doFoo($param):     Foo;

}

class FooBar implements Foo
{

	public function doFoo($param):   Foo
	{

	}

}
